REL is a closed-ended investment company that invests exclusively in the global energy industry, with a particular focus on the exploration & production and midstream sectors. REL aims to capitalise on the opportunities presented by Riverstone's energy investment platform. REL is a member of the FTSE 250 and its ordinary shares are listed on the London Stock Exchange, trading under the symbol RSE. To date, REL has made 17 investments spanning conventional and unconventional oil and gas activities in the Gulf of Mexico, Continental U.S., Western Canada, the U.K. North Sea, the Norwegian Sea, Mexico and credit.

Neither the contents of Riverstone Energy Limited's website nor the contents of any website accessible from hyperlinks on the websites (or any other website) is incorporated into, or forms part of, this announcement.

Media Contacts

For Riverstone Energy Limited:

Brian Potskowski

Natasha Fowlie

+44 20 3206 6300

Note:

The Investment Manager is charged with proposing the valuation of the assets held by REL through the Partnership. The Partnership has directed that securities and instruments be valued at their fair value. REL's valuation policy follows IFRS and IPEV Valuation Guidelines. The Investment Manager values each underlying investment in accordance with the Riverstone valuation policy, the IFRS accounting standards and IPEV Valuation Guidelines. The Investment Manager has applied Riverstone's valuation policy consistently quarter to quarter since inception. The value of REL's portion of that investment is derived by multiplying its ownership percentage by the value of the underlying investment. If there is any divergence between the Riverstone valuation policy and REL's valuation policy, the Partnership's proportion of the total holding will follow REL's valuation policy. There were no valuation adjustments recorded by REL as a result of differences in IFRS and U.S. Generally Accepted Accounting Policies for the period ended 30 September 2017 or in any period to date. Valuations of REL's investments through the Partnership are determined by the Investment Manager and disclosed quarterly to investors, subject to Board approval.

For development-type investments, Riverstone also considers the recognition of appreciation or depreciation of subsequent financing rounds, if any. For those early stage privately held companies where there are other indicators of a decline in the value of the investment, Riverstone will value the investment accordingly even in the absence of a subsequent financing round.

Riverstone reviews the valuations on a quarterly basis with the assistance of the Riverstone valuation committee as part of the valuation process.

The Audit Committee reviews the valuations of the Company's investments held through the Partnership, and makes a recommendation to the Board for formal consideration and acceptance.

1 Realised capital is total gross proceeds realised on invested capital. Of the $338 million of capital realised to date, $199 million is the return of the cost basis, and the remainder is profit.

2 Net invested capital is total invested capital less cost basis of the realised capital.

3 Gross MOIC is Multiple of Invested Capital. Gross Unrealised Value and Gross MOIC are before transaction costs, taxes (approximately 35 to 41.5 per cent. of U.S. sourced taxable income) and 20 per cent. carried interest on gross profits (without a hurdle rate). Since there is no netting of losses against gains, the effective carried interest rate on the portfolio as a whole will be greater than 20 per cent. In addition, there is a management fee of 1.5 per cent. of net assets per annum and other expenses. Given these costs, fees and expenses are in aggregate expected to be considerable, Total Net Value and Net MOIC will be materially less than Gross Unrealised Value and Gross MOIC. Local taxes, primarily on US assets, may apply at the jurisdictional level on profits arising in operating entity investments. Further withholding taxes may apply on distributions from such operating entity investments. The Company is structured, and has structured its investments, to eliminate the incurrence of U.S. sourced taxable income by REL's investors.

4Credit investment.

5Midstream investment.

6 Amounts may vary due to rounding.

7 Based on total capital raised of $1,320 million, bank loan, realised profits and other income net of fees, expenses and performance allocation. The Board does not expect to fully fund all commitments in the normal course of business.

8 The unrealised value of the Rock Oil investment consists of rights to mineral acres.